Can u plz me asap. i really need i dont unferstand at all.

The solution follows the sequence ...

The problem is in the first step, where parentheses are eliminated. One of the multiplications is done incorrectly, and the error is propagated through the rest of the solution.

0.15(y -0.2) = 0.15y - 0.03 . . . . not 0.15y - 0.3

If you carry forward the value 0.03 instead of 0.30, you find the answer is

... -153/35 = y

Some of the other steps should be ...

.15y -.03 = 2 - .5 + .5y

15y -3 = 150 +50y

-153 = 35y

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this

answer: get jesus in your life

step-by-step explanation: